1) nominal discharge of a turbine
2) rated discharge of a turbine
3) turbine flow
4) operating flow of a turbine
the rate of flow for which the turbine is designed
GRM: n. (1,2,3,4)
References:
GEN flow
SEE nominal delivery of a pump
SEE rated discharge of a pump
SEE rated delivery of a pump
SEE nominal discharge of a pump

ENERGY TERM COURTESY OF ENERGY.EU